a hannibal lecter. >> mysterious murders. and murders. >> four of the victims were found in a burlap-type material. >> kaj larsen traces the trail of a serial killer still on the loose. >>> this is babylon, long island, an hour's drive away from manhattan, and it is known for beautiful million dollar homes and secluded beaches. but that same isolation that people come here to seek, as of late, has been masking a darker element. in december, police in long island make a shocking discovery. >> i don't think it's a coincidence that four bodies ended up in this area. >> for the past couple of years, women kept disappearing on long island. now, police think they may know why. >> we could have a serial killer. >> we are dealing with a psychotic murderer. >> police still don't have answers, so we tried to get to the bottom of this eerie mystery. >> where do we go now, gus? >> gus coletti, a man neighbors call the unofficial mayor of this community, shows me around. >> that's the house. that's where it all began. >> reporter: he tell